Current-sense amplifiers

Maximize your system with current sensing solutions for protection, feedback control & system monitoring

parametric-filterView all products
Whether you need to detect an overcurrent fault for system diagnostics, improve system power efficiency, or provide closed-loop feedback, our portfolio of current sense amplifiers delivers industry-leading current sensing accuracy across a broad range of common mode voltages and temperatures for any current sensing application without sacrificing cost and size.

Browse by category

Featured current sensing amplifiers

INA4230
Digital power monitors

Quad channel, 16-bit, high-precision, current, voltage, power and energy monitor with I²C Interface

Approx. price (USD) 1ku | 1.5

INA790B
Analog current-sense amplifiers with integrated shunt resistor

–4V-to-110V bidirectional ultra-precise current-sense amplifier with enhanced PWM rejection

Approx. price (USD) 1ku | 1.4

INA185-Q1
Analog current-sense amplifiers

AEC-Q100, 26-V, 350-kHz, bi-directional, high-precision current sense amplifier

Approx. price (USD) 1ku | 0.354

INA740B
Digital power monitors with integrated shunt resistor

85-V 16-bit I²C-output digital power monitor with 800-µΩ EZShunt™ Technology

Approx. price (USD) 1ku | 0.83

INA4235
Digital power monitors

Quad channel, 16-bit, ultra-precise, current, voltage, power and energy monitor with I²C Interface

Approx. price (USD) 1ku | 2.5

INA791B
Analog current-sense amplifiers with integrated shunt resistor

–4V-to-110V bidirectional high-bandwidth current-sense amplifier with enhanced PWM rejection

Approx. price (USD) 1ku | 1.4

Benefits of our current sensing amplifiers 

checkmark

Low-drift architecture

Achieve low drift over a wide temperature range with our zero-drift architecture and precision matched, integrated gain resistors. 

checkmark

High accuracy

Increase overall system performance and efficiency with higher accuracy due to low input offset and low gain error, enabling lower ohmic shunts and minimizing power dissipation.

checkmark

Wide common-mode input range

Measure common-mode voltages beyond your amplifier’s supply voltage rail (from 120 V to -22 V) to address high-voltage system needs, like batteries in electric vehicles and motor-control systems.

Flexible current-sensing solutions for your design

Achieve accurate and fast current sensing in every system

Whether you need to detect an overcurrent fault, improve system efficiency, or provide closed-loop feedback, TI's large portfolio of current-sensing solutions enables industry-leading accuracy for a range of common-mode voltages and temperatures – without sacrificing system size, complexity or cost. Through decades of experience, we have developed leading-edge current-sensing technology that empowers engineers to achieve maximum system performance, power efficiency and reliability.

Learn more about our key product categories for current sensing: 

Learn more about many common and challenging functional circuits

Designers have various choices when creating precise current-measurement circuits for cost-effective applications. Read our e-book An Engineer’s Guide to Current Sensing to learn how to streamline the design process. The e-book discusses popular functional circuits and highlights our best devices for specific challenges. Additionally, it suggests alternative solutions for further circuit enhancements.

Download the e-book:

Technical resources

Video series
Video series
TI Precision Labs - Current sense amplifiers
Check out this comprehensive curriculum for current sense amplifiers. The series is comprised of short training videos that cover the basics of current sense amplifiers, tips for applications, debugging, key specs and more.
Application brief
Application brief
Introduction to Current Sense Amplifiers
Learn the basics of current sense amplifiers, including the different technologies, key parameters, and some introductory design considerations.
document-pdfAcrobat PDF
E-book
E-book
An Engineer's Guide to Current Sensing (Rev. B)
Explore a comprehensive library of application-specific current sensing design challenges and how to solve them.
document-pdfAcrobat PDF

Discover featured applications

DC Motor Drives
Optimize the performance and power efficiency of DC motor drives by using current-sense amplifiers
Collaborative and Industrial Robots
Precision current sensing enables increased power efficiency and real-time control in robotics systems
Solar DC/DC Converter Equipment
Precisely monitor current in solar-powered systems to ensure proper operation and maximum conversion efficiency

Optimize the performance and power efficiency of DC motor drives by using current-sense amplifiers

Precision current sensing enables real-time control with in-line phase monitoring in DC motor drives, servo motors and drone accessories to increase the level of control, safety and performance in motor drive systems.

Benefits:

  • Less than 0.5% full-scale error over –40°C to +125°C temperature range.
  • Support for up to 110-V common-mode voltage operation.
  • In-line phase motor control with enhanced pulse-width-modulation rejection.
  • High bandwidth and high slew rate enable fast out-of-range detection.

Featured resources

REFERENCE DESIGNS
  • TIDA-00909 – 48V/10A High Frequency PWM 3-Phase GaN Inverter Reference Design for High-Speed Drives
  • TIDA-00913 – 48V 3-Phase Inverter with Shunt-based In-line Motor Phase Current Sensing Reference Design
  • TIDA-00302 – Current Shunt Monitor with Transient Robustness Reference Design
PRODUCTS
  • INA241A – -5-V to 110-V bidirectional ultraprecise current sense amplifier with enhanced PWM rejection
  • INA381 – 26-V, 350-kHz current sense amplifier with integrated over-current comparator
  • INA180 – 26V, 350kHz current sense amplifier
HARDWARE DEVELOPMENT

Precision current sensing enables increased power efficiency and real-time control in robotics systems

Design with precision current-sense amplifiers for real-time control in robotic systems with in-line phase monitoring in collaborative, industrial robots and mobile robots, increasing the level of control, safety and performance in robotics systems.

Benefits:

  • Less than 0.5% full-scale error over –40°C to +125°C temperature range.
  • Support for up to 110-V common-mode voltage operation.
  • In-line phase motor control with enhanced pulse-width-modulation rejection.
  • High bandwidth and high slew rate enable fast out-of-range detection.

Featured resources

REFERENCE DESIGNS
  • TIDA-00909 – 48V/10A High Frequency PWM 3-Phase GaN Inverter Reference Design for High-Speed Drives
  • TIDA-00913 – 48V 3-Phase Inverter with Shunt-based In-line Motor Phase Current Sensing Reference Design
  • TIDA-00302 – Current Shunt Monitor with Transient Robustness Reference Design
PRODUCTS
  • INA241A – -5-V to 110-V bidirectional ultraprecise current sense amplifier with enhanced PWM rejection
  • INA226 – 36V, 16-bit, ultra-precise i2c output current/voltage/power monitor w/alert
  • INA180 – 26V, 350kHz current sense amplifier
HARDWARE DEVELOPMENT
  • BOOSTXL-3PHGANINV – 48-V Three-Phase Inverter With Shunt-Based In-Line Motor Phase Current Sensing Evaluation Module
DESIGN TOOLS AND SIMULATION
SOFTWARE DEVELOPMENT

Precisely monitor current in solar-powered systems to ensure proper operation and maximum conversion efficiency

In solar-powered systems, precise monitoring of current and the use of maximum power-point tracking in DC/DC converters and other subsystems enables system optimization to ensure maximum efficiency and performance.

Benefits:

  • Less than 0.5% full-scale error over –40°C to +125°C temperature range.
  • Support for up to 110-V common-mode voltage operation.
  • High bandwidth and high slew rate enable fast out-of-range detection.

Featured resources

REFERENCE DESIGNS
  • TIDA-01598 – Low Side, High Bandwidth Current Amp and Fault Detection for Solar Inverters Reference Design
  • TIDA-010042 – 400-W GaN-based MPPT charge controller and power optimizer reference design
  • TIDA-00332 – High Voltage 12 V – 400 V DC Current Sense Reference Design
PRODUCTS
  • INA241A – -5-V to 110-V bidirectional ultraprecise current sense amplifier with enhanced PWM rejection
  • INA2290 – Dual-channel, 2.7-V to 120-V, 1.1-MHz, ultra-precise current sense amplifier
  • INA4290 – Quad-channel, 120-V, high-voltage, high-bandwidth, unidirectional current sense amplifier
DESIGN TOOLS AND SIMULATION

Design & development resources

Calculation tool
Current sense amplifier comparison and error tool
This Excel calculator provides a comparison between two and five of our standard current sense amplifiers, delivering a chart containing the basic parameters of each device. This calculator also takes system condition inputs from users such as common-mode voltage, supply voltage, shunt resistor (...)
IDE, configuration, compiler or debugger
System configuration tool

SysConfig is a configuration tool designed to simplify hardware and software configuration challenges to accelerate software development.

SysConfig is available as part of the Code Composer Studio™ integrated development environment as well as a standalone application. Additionally SysConfig (...)

Simulation tool
PSpice® for TI design and simulation tool
PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)